Digital Watermarking Using Inter-Block Correlation. - Yoonki Choi; Kiyoharu Aizawa (ICIP (2), 1999)

Digital Watermarking using Inter-Block Correlation: Extension to JPEG Coded Domain. - Yoonki Choi; Kiyoharu Aizawa (ITCC, 2000)

Universal watermark estimation scheme based on error probabilities. - Yoonki Choi; Kiyoharu Aizawa (Security and Watermarking of Multimedia Contents, 2001)